20131234742 has 16 divisors (see below), whose sum is σ = 30465666000. Its totient is φ = 9976307040.

The previous prime is 20131234733. The next prime is 20131234757. The reversal of 20131234742 is 24743213102.

It is a super-2 number, since 2×20131234742² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64109 + ... + 210647.

It is an arithmetic number, because the mean of its divisors is an integer number (1904104125).

Almost surely, 2^20131234742 is an apocalyptic number.

20131234742 is a deficient number, since it is larger than the sum of its proper divisors (10334431258).

20131234742 is a wasteful number, since it uses less digits than its factorization.

20131234742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147151.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 20131234742 its reverse (24743213102), we get a palindrome (44874447844).

The spelling of 20131234742 in words is "twenty billion, one hundred thirty-one million, two hundred thirty-four thousand, seven hundred forty-two".